Regent Seven Seas Cruises is offering a free post-cruise hotel night on 2013-14 winter cruises booked by Dec. 31. The new Winter Collection, operating from November 2013 through May 2014, explores South America, Asia, the South Pacific, Europe, the Caribbean and Alaska.

All sailings include two-for-one fares, free air and bonus savings of up to $15,000 per suite when booked by Dec. 31. Regent sailings also include premium spirits and fine wines, free shore excursions,…